国外文献 > 1.轴承 > 3. 材料与制造 > 轴承材料
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| 标 题： |
Case study: The effect of running distance on the microstructure and properties of railroad axle bearings
案例研究：运行距离对铁路车轴轴承微观结构和性能的影响 |
| 作 者： |
Guo, Rubing
Lei, Xianqi
Zhang, Dongdong
Liu, Zhiming
Wang, Xi
Wei, Yujie |
| 关键词： |
Bearing steel [轴承钢]
Fracture toughness [ 断裂韧性]
Gradient structure [ 梯度结构]
Grain refinement [ 晶粒细化] |
| 出版年： |
2018 |
| 期刊名： |
Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear
磨损：摩擦、润滑与磨损科学与技术国际期刊 |
| 年卷期： |
2018, vol.394/395 |
| 摘 要： |
As a key component, axle bearings play an important role in transmission systems. Motivated by the rapid growth of railway network and the significance of bearing safety, we report here how different operating duration may alter the macroscopic and microscopic mechanical property of high speed train axle bearing's outer ring made of GCr15 steel, a high-carbon chromium bearing steel known for its superb contact fatigue resistance, good dimensional stability and excellent corrosion resistance. We characterized the structural and mechanical properties of the load carrying zone at operating duration of new, 1.2 Mkm and 2.4 Mkm bearing. In contact to the as-received ones, the outer ring samples show clear grain refinement, exhibit inhomogeneous hardness distribution and show a decrease of about 42% for the tensile elongation after 2.4 Mkm operation.
作为关键部件，车轴轴承在传动系统中发挥着重要作用。受铁路网络快速扩张以及轴承安全性的重视推动，本文报告了不同运行时间对高速列车车轴轴承外圈（由GCr15钢制成）宏观和微观力学性能的影响。GCr15钢是一种高碳铬轴承钢，以其优异的接触疲劳强度、良好的尺寸稳定性和出色的耐腐蚀性而著称。我们对新轴承、运行1.2百万公里和2.4百万公里后的轴承载荷区进行了结构与力学性能分析。与原始状态相比，外圈样品表现出明显的晶粒细化，硬度分布不均，并且在运行2.4百万公里后，拉伸延伸率下降约42%。 |
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